Multi-band remote oriented loud acoustic system

Abstract

A multi-band remote oriented loud acoustic system is composed of a signal input device, a low pass filter 1, an A / D converter 1, an omnidirectional microphone, a low pass filter 2, an A / D converter 2, a digital signal processor and acoustic emission channels. The acoustic emission channel is composed of a power amplifier, a match circuit and a transducer unit. A plurality of acoustic emission channels simultaneously exist in the system and are respectively corresponding to different frequency bands. According to the system, automatic acoustic sample selection can be realized according to objects in the outside world, and oriented loud acoustic signals can be emitted simultaneously through the acoustic emission channels of different frequency bands. Thus, the system can have effects on a plurality of objects simultaneously.

Description

technical field

[0001] The invention relates to a remote directional loudspeaker system, in particular to a multi-band remote directional loudspeaker system capable of dynamically adjusting frequency bands. Background technique

[0002] The long-distance directional strong sound system uses the sound wave directional technology to direct the high-power sound wave to a long distance, so as to achieve the purpose of long-distance clear notification, warning, or dispersing and rejecting the affected object. According to different objects, the system needs to use sound waves of different frequency bands to achieve the best effect. For example, sound waves of 5-15KHz can drive away animals such as elephants, owls, canaries, and small parrots, and sound waves of 15-30KHz can drive away Horses, sheep, chinchillas, mice and other animals, 25-40KHz sound waves can drive away dogs, cows, horses, sheep, mice, raccoons, American porcupines and ferrets, etc., 20-65KHz sound waves can dri...

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